Mannose binding lectin deficiency and COVID-19 rates of thrombosis and mortality: Partial protection by immunodeficiency

Objective: The purpose of this study is to determine the effects of COVID-19 infection on individuals with mannose binding lectin deficiency. Methods: An electronic medical records search was conducted for MBL deficiency and COVID-19 positive tests from March 2020-August 2022. Individualized chart analysis was conducted and statistical analysis was performed. Results: Thirty-three people in WVU medicine health system carry a diagnosis of mannose binding lectin deficiency and were diagnosed with COVID-19. The mean age of this cohort was 41 years. Seven individuals had severe enough symptoms to lead to an emergency department visit. One person was hospitalized. MBL deficient individuals had 7 times the odds of hospitalization ( p = .1506, OR 7.06 (CI 1.117-44.52)) compared to the general public. There was zero mortality among the MBL deficient population. None of the patients reported thrombosis or blood clots. Conclusion: This retrospective cross-sectional analysis of those with known MBL deficiency and COVID-19 infection suggest a lower risk of fatalities and thrombotic events in this cohort. There was however a higher odds ratio of hospitalization compared to the general public, although this was not statistically significant.